Linehaul percent company driver, and the math doesn't add up.

Tell them you want to see the invoice.

 

"I'm a company driver that gets paid percentage of load minus the extra fuel surcharge amount."
Let's call Load $ = X
Fuel Surcharge = Y
Is it: .31X - Y or
.31 (X - Y)
Might be that they are deducting the fuel surcharge from the total amount paid and then applying the percentage.
If Z = total amount paid then
.31(Z - Y) makes sense
Ask the company to show you their calculations and ask why your percentage is 29 and not 31%.

 

The company rounds things off in their favor and I've rarely ever seen things adjusted in the driver's favor.

Some places justify their thumb on the scale as the cost of doing the back office...

There is/are ten thousand to the 100th power excuses management uses!

 

So are you saying that you should have been paid $804.96 x .31 = 249.54 on the 30.96 tons? Instead you were paid $170.57?

"And boss says he just upped the "fake" rate to make it right"
Are you saying that he corrected the 588.17 and changed to 804.96?
So both the rate and percentage are wrong. He needs to fix the percentage and not just the rate.

Hard to tell as I can't see the whole document. If you want, PM me the doc or I can give you my email there.

It's not so much the math as it appears he is using a bogus rate or got things mixed up. How long have you worked there?